33400444220 has 96 divisors (see below), whose sum is σ = 82897952256. Its totient is φ = 11144044800.

The previous prime is 33400444219. The next prime is 33400444241. The reversal of 33400444220 is 2244400433.

It is a super-2 number, since 2×33400444220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 33400444220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 442655 + ... + 512585.

It is an arithmetic number, because the mean of its divisors is an integer number (863520336).

Almost surely, 2^33400444220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33400444220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41448976128).

33400444220 is an abundant number, since it is smaller than the sum of its proper divisors (49497508036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33400444220 is a wasteful number, since it uses less digits than its factorization.

33400444220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70131 (or 70129 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 33400444220 its reverse (2244400433), we get a palindrome (35644844653).

The spelling of 33400444220 in words is "thirty-three billion, four hundred million, four hundred forty-four thousand, two hundred twenty".